Satan will be loosed out of his prison. Revelation 20:7-8.

        At the end of the Millennial Age, the angel who imprisoned satan will unlock the Bottomless Pit and satan will come out mad because of it, to vent his anger upon the people of God. He will be the same character that he was before. His hatred against God and His people will be unquenchable.

                He will only be able to touch those born during the Millennium and those who died below the age of accountability during the ages from creation to the end of the 1000 years.